ics557-01 Integrated Device Technology, ics557-01 Datasheet - Page 2

• Manufacturer Part Number: ics557-01
• Description: Pci-express Clock Source
• Manufacturer: Integrated Device Technology

Pin Assignment
Pin Descriptions
IDT™ / ICS™ PCI-EXPRESS CLOCK SOURCE
Number
ICS557-01
PCI-EXPRESS CLOCK SOURCE
Pin
1
2
3
4
5
6
7
8
GN D
OE
X 1
X 2
8 P i n ( 1 5 0 mi l ) S OI C
Name
IREF
GND
VDD
CLK
CLK
Pin
OE
X1
X2
1
2
3
4
Output A 475Ω precision resistor connected between this pin and ground
Output HCSL differential complementary clock output.
Output HCSL differential clock output.
Power
Power
Type
Input
Input
Pin
XO
8
7
6
5
Output Enable signal
(H = outputs are enabled, L = outputs are disabled/tristated).
Internal pull-up resistor.
Crystal or clock input. Connect to a 25 MHz crystal or single ended clock.
Crystal Connection. Connect to a parallel mode crystal.
Leave floating if clock input.
Connect to ground.
establishes the external reference current.
Connect to +3.3 V.
V DD
CL K
CL K
I RE F
2
Pin Description
ICS557-01
PCIE SSCG
REV H 062607